Register flib_gameconn callbacks

first merge

merge from default

Made user data path default to '.'.

Create hedgewars.ini if not exists manually, as QSettings uses QTemporaryFile for that, and QTemporaryFile doesn't respect custom file engines.

GCI2012: Navigation Output

GCI2012: Convert uMobile into a Callback Record

don't allow resizing videorec widgets

GCI2012: Move Video Preferences in Settings Tab

Merged changes from upstream.

Move video description text underneath thumbnail to prevent the layout from resizing.

Fix crashes and wtf behaviour introduced in r0b8beacff8a5